Hydraulic motor.



J, E. FEE. HYDRAULIC MOTOR.

APPLICATION FILED JUNE 5, 1911.

Patented 0013. 29, 1912.

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COLUMBIA PLANOGRAPH c0.. WASHINGTON. D. c.

J. E. FEE.

HYDRAULIC MOTOR.

APPLICATION FILED JUNE 5, 1911.

Patentd 0012111912.

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HYDRAULIC MOTOR. APPLIDATION FILED JUNB5, 1911.

1,042,420. Patented Oct. 29, 1912.

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l I L F r a Snuenio'o J. E. FEE.

HYDRAULIC MOTOR.

APPLIGATION FILED JUNE 5, 1911.

4 SHEET SSHEET 4.

COLUMBIA PLANOGRAPH cu WASHINGTON, D. :4

UNTTED @TATES PATENT FFTE JOHN EVERETT FEE, OF MONTREAL, QUEBEC, CANADA.

HYDRAULIC MOTOR.

Application filed June 5, 1911.

T0 aZZ whom it may concern Be it known that T, JOHN Evnnnrr FEE, of thecity of Montreal, in the Province of Quebec, Canada, have inventedcertain new and useful Improvements in Hydraulic Motors; and I do herebydeclare that the following is a full, clear, and exact description ofthe same.

This invention relates to that type of fluid motor wherein the motivefluid is first directed to one end of the piston cylinder to move thepiston in one direction and automatically shut off and directed to theopposite end of the cylinder to reverse the movement of the piston.

One of the objects of the present invention is to provide a pair ofcooperating devices, preferably valve mechanisms, one of which directs aportion of the motive fluid and causes it to act upon the other to moveand alternately direct the main volume of the motive fluid to each endof the piston cylinder to reciprocate the piston while at the same timedisposing of the exhaust on the reversal of the stroke of the piston.

A further object is to so form the fluid controlling valve that thedirection of flow of the motive fluid is reversed gradually and withoutany sudden ar or jerk thus increasing the life and usefulness of themotor.

A still further object is to so form the entire motor that the cost ofmanufacture is comparatively slight for the reason that very littlemachining is required and the parts are easily and quickly assembled.

For full comprehension, however of my invention reference must be had tothe accompanying drawings, forming a partof this specification, in whichsimilar reference characters indicate the same parts and wherein Figure1 is a front elevation of my im proved motor, partly broken away. Fig. 2is a longitudinal vertical sectional view taken on line A A Fig. 1 andlooking in the direction of the arrow; Fig. 3 is a similar view to Fig.2 taken on line C C Fig. 1 and looking in the direction of the arrow;Fig. 1 is a longitudinal vertical section with the front portion of thepump removed; Fig. 5 is a similar view to Fig. 4L and taken on line B BFig. 2; Fig. 6 is a perspective view of the main valve; Fig. 7 is abottom plan of the auxiliary valve and casing; Fig. 8 is adiagrammatical view of the connection between the piston and theauxiliary valve;

Specification of Letters Patent.

Fatented Oct. 29, 1912.

Serial No. 631,387.

and Fig. 9 is a perspective view of the complete motor set up.

Briefly this invention comprises a cylinder within which is the piston,a main motive fluid controlling valve and an auxiliary valve operativelyconnected to the piston, such auxiliary valve directing a portion of themotive fluid to the main valve for the pur pose of reversing the flow ofthe main body of motive fluid from one end of the piston cylinder to theother, and to connect the opposite end of the cylinder with the exhaust,this being automatically accomplished by means of the connection betweenthe piston and the auxiliary valve.

Referring now to the drawings 5 indicates a casting which to facilitatemanufacturing is made up of several parts bolted together and insulatedas will be apparent from the drawings.

The motor when in operation is preferably set upright and suitablysupported by standards 0 as shown in Fig. 9, the standards being sosituated with relation to the piston cylinder d that the reciprocationof the piston is not interfered with so that the movement of the lattermay be readily utilized for any suitable purpose. The cylinder (Z isclosed at its upper end by a cap 9 the lower end having an openingtherein to accommodate the piston rod 6, such hole being suitablypacked. The piston is preferably formed by reducing and screw-threadingthe inner end of the piston rod and mounting a pair of oppositely facingcup-like resilient washers 10 and 11, secured in place by flat metallicwashers 12 between and on opposite sides thereof and held firmly uponthe shoulder, formed by the reduced portion, by a nut 13.

Situated preferably at one side of and at right angles to the cylinder dis the main valve casing g communicating with the ends of the cylinderby conduits h and 2' respectively, which latter extend from the ends ofthe said cylinder to the top of the main valve casing at distinct pointsin the longitudinal line of the latter, for a purpose which will beapparent from the following description. The motive fluid supply passagej communicates with one side of the main valve casing while the exhaustpassage is communicates with the opposite side.

Main oaZoe.To direct the motive fluid to one end of the cylinder d andsimultaneously lead the exhaust from the opposite end of the cylinder tothe exhaust passage 70, I employ a hollow valve or plunger Z see, Fig. 6situated within the casing g and milled to fit perfectly therein. In theside of the plunger adjacent to the supply passage j is formed alongitudinally extended aperture m connecting the passage j with theinterior of the plunger, while at the top of the plunger near its endsare formed longitudinally disposed slots 71 and 0 of less extentvertically than the openings of the conduits h and z'; the side of theplunger adjacent to the exhaust passage 76 has an angular groove formedtherein, preferably of T-form and having one portion 29 extendinglongitudinally of the plunger and communicating with the exhaust 79, theother portion 7) being disposed circumferentially of the plunger andextends to the top of the latter midway between the slots 1 and 0. Theplunger Z is of less length than the interior of its casing g and isadapted to slide from one end to the other of the same, and when in theposition shown in Figs. 1 and 2, the slot n brings the conduit it intocommunication with the interior of the plunger and so with the supply,the slot 0 being closed by the top of the casing 9 while the conduit 1'is connected with the exhaust by the portions 29 and p of the groove inthe plunger.

From the foregoing it will be seen that the motive fluid will bedirected to the lower end of the cylinder cl and when the plunger ismoved to the opposite end of the casing 9 where it abuts against theadjacent end of the casing (see Figs. 4 and 5) the slot 1% will be movedout of line with the conduit and the slot 0 simultaneously brought toregister with the conduit 2', the grooves 29 and 7) moving along intocommunication With the conduit h and the flow of the motive fluiddirected to the upper end of the cylinder, the lower end of the same nowbeing in communication with the exhaust. The length of the aperture mand portion p of the T- groove being sufficient to always maintain theircommunication with the supply and exhaust respectively while the plungeris at either end of the casing.

Auxiliary oaZ'vc.To cause the plunger to slide from one end of itscasing to the other and so reverse the flow of the motive fluid Iprovide auxiliary valve mechanism comprising a casing Q situatedparallel to the cylinder (Z and on the opposite side of the main valveto the latter. This auxiliary valve casing communicates with the ends ofthe main valve casing g by conduits 7' and 7 opening into opposite sidesof the interior of easing Q at longitudinally olfset points. A passage 8leads from the supply passage, between the intake and the main valvecasing, to the casing Q between the offset openings 1* and 7" while apassage t leads from the ends of the said auxiliary valve casing to aduct 14 leading to the exhaust passage 70. The top of the auxiliaryvalve casing is closed, the bottom being open to permit the insertion ofa valve rod 11 carrying two valve disks 2 and 3 separated a. distanceequal to the distance between the offset openings 9 and r. the open endbeing then closed by a gland nut to and suitable packing. The rod oextends outside the casing Q and has rigidly secured along its lengthcollars 4 and 5 by means of which and a rigid arm 6, carried by thepiston rod 0, the arm being forked at its free end to straddle the valverod o between the collars 4 and 5 and engage the same as the pistonnears the end of its stroke in either direction, the valve dis {S 2 and3 are moved to alternately open the passages 1" and r to the supplypassage 8 and the exhaust t at the ends of the casing (I. For instance,the disks when in the position shown in Figs. 1 and 2 direct the flowfrom s to the passage 1" and connect the passage 1" with the upper endof the exhaust passage t and upon movement of the disks to the positionshown in dotted lines Fig. 2, the passage 7* will receive the flow from8 while the passage r will be in communication with the lower end of theexhaust passage 2f.

Operation: The piston and valves of the pump being in the positionsshown in Figs. 1 and 2 the motive fluid under head or pressure isconducted through the passage j and aperture m to the interior of theplunger Z from where it passes through slot 91, and conduit h to thelower end of the cylinder d, forcing the piston up. A portion of themotive fluid is conveyed by passage 8 to the auxiliary valve casing (1from where it passes through passage 1" to the opposite end of the mainvalve casing to which the plunger Z is situated (the right hand end asseen in Fig. 1) where it tends to maintain the plunger in such positionwith its end abutting against the end of the casing.

ReoersaZ.As the piston nears the end of its upward stroke the forked arm6 engages the collar 4 and imparts the movement of the piston to thedisks 2 and 3 so that when the end of the stroke of the piston isreached the disks will have been moved to the position shown in dottedlines Fig. 2 thereby directing the flow from 8 through the passage r tothe opposite or left hand side of the main valve casing 9, cutting offthe supply from the right hand end and bringing the latter end intocommunication with the exhaust through the passages 1" and 2?. As willbe apparent the disks 2 and 3 gradually close one passage to the flowfrom s simultaneously with the opening of the other passage so that theflow is directed from one passage to the other without a sudden jerk.The flow, being reversed as justdescribed, slides the plunger to theposition shown in Figs. 4t and 5 (the exhaust being forced back throughpassage 1" and to the exhaust passage 70 with which it is now incommunication through the passage t and duct to) thus moving the slot nvout of line with the conduit 72 and simultaneously causing theheretofore closed slot 0 to register with the conduit 2', the exhaustgroove now assuming a position in line with the conduit it so that whenthe motive fluid is directed through conduit 2' to the upper end of thecylinder andforces the piston upon its downward stroke, the exhaust fromthe lower end of the cylinder will be forced back through conduit h andso to the exhaust passage 70. The small extent vertically of the slotsat and 0 relatively to the conduits h and i and the manner (the slots atand 0 being disposed longitudinally of the plunger) in which theygradually come into line with each other prevent any sudden jerk whenthe flow is reversed. As the required movement of the disks 2 and 3 isless than that of the piston, the difference is taken up by so spacingthe collars 4 and 5 along the rod 1; that the forked arm 6 travelsfreely therebetween until the piston approaches the end of its stroke atwhich time the arm 6 engages one of the said collars, the remainingmovement of the piston being sutficient to operate the disks 2 and 3.This operation is illustrated in diagram in Fig. 8.

l/Vhat I claim is as follows: In a fluid motor the combination withcylinder, a piston rod and a piston fixed thereto, a motive fluid supplyfor reciprocating the piston rod, and an exhaust,of a

chamber situated at the side and bet-ween the ends of the cylinder andclosed at its ends, the supply and exhaust opening thereinto at oppositesides, a pair of conduits longitudinally placed relatively to thecylinder and leading from the ends of the latter to the said chamber, ahollow plunger slidable in the chamber and having an aperture thereincommunicating with the supply, slots in the plunger adapted toalternately bring the said conduits into communication with the interiorof the latter, and a T groove upon the exterior of the plunger incommunication with the exhaust and adapt ed to alternately register withthe said conduits, a valve casing parallel with and separated from thecylinder by the plunger chamber, a conduit leading from the supply tothe center of the valve casing, passages leading from the ends of theplunger casing and opening into the Valve casing on opposite sides ofthe centrally placed conduit, a valve stem, a pair of valve diskscarried by the valve stem, an arm operatively connecting the valve stemto the piston rod for the purpose of alternately bringing the saidpassages into communication with the said central conduit, and passagesfrom the ends of the valve casing to the exhaust.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

JOHN EVERETT FEE.

WVitnesses:

STANLEY G. KING, JAMES FRASER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

